What did OSINTdefender (@sentdefender) post on X, week of Sep 15 – Sep 21, 2026?

US-Iran Conflict & Diplomacy

The Iran war and its Houthi spillover took up nearly half @sentdefender's output this week, driven by a rapid Houthi offensive against Saudi Arabia that pushed Trump to cut short a Camp David stay and return to Washington [1].

Houthi-Saudi escalation & U.S. response: The Houthis launched a major offensive seizing Yemen's Red Sea coastline and Perim Island, expanded strikes on Saudi oil infrastructure and air bases, and claimed to have shot down a Saudi F-15 over Marib — @sentdefender tracked the claim from a cryptic 'F15' post by a Houthi political figure to full video of the crash site [2][3][4][5]. Saudi Civil Defense activated early warnings across Yanbu, Jazan, and Abha [6], and the Houthis targeted Mecca with a drone intercepted outside city limits [7]. Saudi Crown Prince MBS twice asked Trump for direct U.S. military help; Washington declined strikes but agreed to provide intelligence and targeting support [8]. CENTCOM commander Adm. Brad Cooper visited Riyadh amid the escalation [8], and senior military commanders from the U.S., Israel, and eight Arab countries secretly met in Germany — the first such gathering since the war began — to discuss expanding protected shipping through the Strait of Hormuz and possible Israeli ISR support for Saudi operations against the Houthis [9]. China then urged Iran to rein in the Houthis at Saudi Arabia's request, the second interlocutor to try after Pakistan failed [10]. The EU's ASPIDES mission raised its alert level for Red Sea escorts, with four vessels including an Italian frigate and French FREMM on rotation [11]. After explosions rocked Sanaa on Sep 20, @sentdefender assessed they were likely Saudi retaliation for Houthi strikes on Riyadh and probably not U.S. action [12][13]. His most-replied post of the week — 81 replies — reported Trump saying Iran was willing to make a deal but would decide on resuming negotiations in an unspecified timeframe [14].

U.S. naval blockade & Strait of Hormuz operations: The U.S. blockade of Iran stayed central all week. @sentdefender tracked the redirected-vessel count climbing from 103 on Sep 15 [15] to 104 [16] to 105 [17], and CENTCOM's Cooper said forces have facilitated transit of more than 1 billion barrels of crude through the Strait of Hormuz in 'the last couple of months,' with 2,000+ vessels moving under U.S. protection and Iran exporting zero barrels since the blockade resumed [18]. UKMTO issued new advisories after vessels were struck transiting the Strait [19]. A U.S.-contracted vessel carrying U.S. personnel was hit near the Strait by four Iranian drones and a missile, causing minor injuries [20]. The El Gaia tanker — Panama-flagged, Qatar-owned — was struck while off the coast of Oman; CENTCOM said Iran first hit it with a missile rendering it inoperable, then struck again with a drone, though @sentdefender noted tracking data didn't fully line up with CENTCOM's timeline [21][22]. Iran's IRGC also claimed shooting down a U.S. MQ-9 over Qeshm Island [23], and the U.S. was investigating whether Iran cyberattacked two energy tankers bound for Texas in the Strait of Gibraltar [24].

War costs, munitions drain & IG report: The Iran war has cost $43.6 billion through September 3, per a Pentagon breakdown shared with the NYT — munitions alone account for $28.1 billion, with more than 50,000 troops assigned [25]. A new IG report thread detailed Operation Epic Fury through June 30: 1,500+ air missions at a peak tempo of 30-40 daily, strategic inventory shortfalls and industrial-base bottlenecks for munitions resupply, four U.S. Army soldiers killed, at least some KC-135s damaged on the ground in Saudi Arabia that may have been destroyed, 9,000 U.S. citizens evacuated, and $44.51 billion in foreign military sales authorized ($25 billion on an emergency basis bypassing Congress) [26]. A separate CBO report listed the loss of two KC-135s and one F-35A — the latter apparently confirming the first combat loss of an F-35 [27]. The U.S. fired 60-70 Patriots and a dozen-plus THAAD interceptors against roughly 20 Iranian ballistic missiles in the latest attack on Jordan, on top of roughly 1,700 Patriots, 200 THAADs, and 150 naval Standard Missiles already expended by mid-July [28]. The Pentagon says stocks aren't depleted, but the IG found strategic shortfalls [28]. The U.S. also warned Japan and other allies to expect delays of up to five years on Patriot and Tomahawk deliveries as it rebuilds stocks [29].

Diplomacy, sanctions & intel: Polymarket priced the Israel-Iran ceasefire holding through December 31 at 65%, up about 5 points in a day, with $30M+ in volume [30]. The House passed the Graham Sanctioning Russia and Iran Act 262-159, now heading to Trump's desk, with tariffs up to 100% on countries buying Russian energy [31]. OFAC sanctioned VTB Bank under the Iran program for helping Iran evade sanctions and move billions in frozen assets [32], and added three Iranians and two Iranian businesses to its list while also designating Cuban entities and removing Belarusian ones [33]. A CNN report revealed an AI-aided intel report falsely assessed a Chinese vessel was carrying nuclear material, nearly triggering an interdiction that @sentdefender said would have 'dampened the U.S.-China diplomatic relationship significantly' before the Xi-Trump meeting [34]. The U.S. approved a $24.3B F-35 sale to Saudi Arabia — 48 jets with engines, crypto gear, and training [35]. The Khatam al-Anbiya HQ warned regional countries that any U.S. 'mistake' would bring unrestricted attacks on American bases [36]. His Sep 21 SITREP judged U.S. strikes against Iran unlikely before the UNGA Gulf-leader meeting on Sep 22, but assessed a reasonable possibility Trump may accede to Saudi requests for Houthi strikes — which would likely prompt the Houthis to close the Bab al-Mandeb [37]. U.N.-backed experts found 'reasonable grounds' to believe the U.S. committed war crimes in two February strikes in Iran, including a school in Minab that killed 150+ people [38].

Unidentified objects over Tehran: On Sep 21, @sentdefender posted videos of an unidentified object over Tehran, saying it wasn't immediately clear what was being filmed [39] — his most-discussed post at 72 replies. Smoke was also seen rising from western Tehran's Chitgar neighborhood, reason unclear [40].

other

The Justice Department unsealed charges against five alleged members of a Russian intelligence-linked network that recruited a Venezuelan in the U.S. to surveil a Russian dissident in D.C. for $1,000-1,500, offering $40,000 for the killing [41]. The network also offered $25,000 to assassinate a dissident in Lithuania and discussed attacks on NATO infrastructure [41]. Mohammad Sharifullah was sentenced to 20 years for ISIS-K support related to the Kabul Abbey Gate bombing — though jurors couldn't unanimously agree his conspiracy caused the deaths [42]. The FBI arrested a 21-year-old Pennsylvania man allegedly preparing an ISIS-inspired mass-casualty attack, recovering a semiautomatic rifle, 190 rounds, and 30 knives [43]. A CIA officer's legal case — involving $40M in gold and $2M in cash — moved toward a plea deal with a third delay pushing the indictment deadline to Oct 8 [44]. A Pensacola charter fishing boat recovered a delta-wing UAV in the Gulf of America resembling an Iranian Shahed-136 but likely an American-built LUCAS or Griffon Aerospace MQM-172 copy [45].